The smallest 4- digit number which is a perfect square is 

$$3\sqrt{ {72.9\over0.4096}}$$ is equal to : 

The simplified value of
$${{1\over 3}÷{1\over 3}×{1\over 3}\over{1\over 3}÷{1\over 3}of{1\over 3}}-{1\over 9}$$

What is the value of x $$ {0.081\over x}={0.09\over10}$$ ?

What is the value of $${0.74×1.23×0.13\over (0.37)^{3}+(0.41)^{3}-8(0.39)^{3}}$$ ?

If 12x – 15 y =9x + 5y, the value of $$ {x^{2}+{y^{2}}\over{x^{2}-y^{2}}}$$ is

The value of $${\sqrt{40+\sqrt{9\sqrt{81}}} }$$ is

Direction : What value should come in the place of question mark (?) in the following questions?

125% of 2440 – 75% of 1856 = ?